# Observer Pro vs PegasusAstro Unity

The clearest difference is price: PegasusAstro Unity at Free against Observer Pro's $13.99. PegasusAstro Unity also leads on update cadence (monthly vs every 6 months) and device support (3 vs 1). Observer Pro's advantage is rating (4.6 vs 1.0) and ratings volume (49 vs 8). On ads and in-app purchases there is nothing between them.

PegasusAstro Unity is free to download; Observer Pro costs $13.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Observer Pro holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Observer Pro has 49 ratings behind it against 8, so its average is the more settled of the two.

Observer Pro ships an update every 6 months, PegasusAstro Unity monthly. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Observer Pro | PegasusAstro Unity |
| --- | --- | --- |
| Price | $13.99 | **Free** |
| Rating | **[4.6 (49 ratings)](https://appshunter.io/ios/app/observer-pro/id462392803/reviews)** | [1.0 (8 ratings)](https://appshunter.io/ios/app/pegasusastro-unity/id1663343148/reviews) |
| Number of ratings | **49** | 8 |
| Positive reviews | 79.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 241 MB | 71 MB |
| Requires iOS | 16.4 | **14.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Joshua Bury](https://appshunter.io/developer/462392806) | [PEGASUS ASTRO CO. LTD](https://appshunter.io/developer/1663343150) |

## What reviewers say

### Observer Pro

[App page](https://appshunter.io/ios/app/observer-pro/id462392803)

This app helps advanced astronomers and astrophotographers plan their observing sessions. It predicts object visibility, factoring in local obstructions, and provides weather forecasts. Manage observing lists and favorite sites to maximize your stargazing time.

**Highlights:** 14,000+ deep sky objects with photos, Local horizon profile measurement, Object visibility prediction charts, Featured object recommendations, Favorite observing site management, Astronomical weather forecasts

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🎯 Excellent target planning and visibility forecasting
- 🌍 Custom horizon mapping feature is intuitive and unique
- 📊 Comprehensive visualization graphs and charts
- 🔍 Extensive DSO catalog with detailed object information
- 📸 Offline object images included

**What reviewers complain about**

- 🐛 Crashes when selecting catalog groupings (recent)
- 🐛 Keyboard doesn't dismiss after input (iPad issue)
- 🐛 Data loss - observer lists disappearing
- 🐛 Search function missing in recent version
- ⏱️ Lack of developer updates for extended periods

**Reported bugs**

- App crashes when selecting catalog groupings (Galaxy, Planetary Nebulae, etc.)
- iOS keyboard doesn't dismiss on iPad after clicking Done
- Observer lists and custom data disappearing after app closure
- Search feature missing in version 1.4
- Continuous crashes since recent updates

**Requested features**

- iPad native app with landscape mode support
- Search functionality restoration/improvement
- Export observer lists to other apps (Sky Safari, etc.)
- Support for planets, comets, and asteroids
- Observing notes and session logging


### PegasusAstro Unity

[App page](https://appshunter.io/ios/app/pegasusastro-unity/id1663343148)

Control your telescope mount with this mobile app. Easily slew to celestial objects and explore the night sky. Designed for both beginners and experienced astronomers, it offers an intuitive interface for stargazing.

**Highlights:** Control NYX-101 mount, Slew to stars, planets, and deep sky objects, User-friendly interface, Intuitive design, Stargazing companion

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Observer Pro free?

Observer Pro costs $13.99, with no in-app purchases.

### Is PegasusAstro Unity free?

PegasusAstro Unity is free to download, with no in-app purchases.

### Which has better reviews, Observer Pro or PegasusAstro Unity?

Observer Pro is rated higher. Observer Pro averages 4.6 out of 5 from 49 ratings, while PegasusAstro Unity averages 1.0 from 8 ratings.

### Do Observer Pro or PegasusAstro Unity have ads?

Neither Observer Pro nor PegasusAstro Unity shows ads.

### Which is updated more often, Observer Pro or PegasusAstro Unity?

Observer Pro ships an update every 6 months, and PegasusAstro Unity monthly. Most recently, Observer Pro was updated on September 21, 2026 and PegasusAstro Unity on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*